PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/23-02:42:50
G07     353.5          64.0                3.5 +/-    0.85       3.8 +/-    0.85  0.040 / 0.120
G08     78.6           52.0                3.7 +/-    0.54       4.5 +/-    0.54  0.050 / 0.130
G09     183.3          61.6                5.3 +/-    0.55       6.0 +/-    0.55  0.040 / 0.040
G11     138.5          20.1                6.3 +/-    1.51      13.8 +/-    1.51  0.030 / 0.030
G23     158.8          30.2                5.5 +/-    1.13       9.7 +/-    1.13  0.070 / 0.120
G27     45.3           23.7                1.7 +/-    2.20       3.4 +/-    2.20  0.080 / 0.150
G28     248.2          39.2                3.5 +/-    0.82       5.2 +/-    0.82  0.030 / 0.030
G30     313.0          44.7                2.9 +/-    0.82       3.9 +/-    0.82  0.030 / 0.030